Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 5

Sanskrit:

ततस्तावङ्गरागेण स्ववर्णेतरशोभिना । सम्प्राप्तपरभागेन शुशुभातेऽनुरञ्जितौ ॥ ५ ॥

ITRANS:

tatas tāv aṅga-rāgeṇasva-varṇetara-śobhināsamprāpta-para-bhāgenaśuśubhāte ’nurañjitau

Translation:

Anointed with these most excellent cosmetics, which adorned Them with hues that contrasted with Their complexions, the two Lords appeared extremely beautiful.

Purport:

The ācāryas suggest that Kṛṣṇa spread yellow ointment upon His body, and Balarāma blue ointment upon His.